Feature spec
Goal: Send a clear invoice after finishing a job.
- Add a client, line items, a due date, and payment instructions.
- Preview the total before exporting a PDF.
- Keep an editable draft if export fails.
App Overview
Putt Break: Golf Green Reader
Read any green like you've got a tour caddie in your pocket
$2.00 · In-app purchases
PRICE
$2.00
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
N/A
No ratings yet
Evidence scope: No current overall US chart position is available. Category-chart positions shown in discovery are a separate scope. Revenue is a directional model estimate, not verified earnings.
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Build Kit
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A product spec, screen plans, and build steps for your coding agent.
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What's included15 files
A product spec, phased build plan, differentiation notes, and screen references.
- START_HERE
- AGENTS
- EVIDENCE
- SPEC
- BUILD_PLAN
- DIFFERENTIATION
- skills/
- screens/
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Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
Screen plan
Invoice editor: Client at the top, editable line items in the middle, total and preview action at the bottom.
States: Empty draft, validation errors beside each field, exporting, and a retry action that preserves the draft.
Differentiate and validate
Hypothesis: Contractors need faster repeat invoices more than more templates.
First experiment: Test duplicating a previous job with five contractors. Watch where they hesitate before expanding the feature set.
The full kit adds a phased build plan, evidence notes, tool prompts, and implementation guidance. It is a plan for your coding agent, not a finished app.
Usage: Mechanics are fair game; never reuse the original name, branding, assets, or verbatim copy.
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Free quick prompt For a smaller starting point
Quick prompt
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
// RORK SYSTEM PROMPT
Rork plan preview for Putt Break: Golf Green Reader: map the core Sports workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
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Opportunities
AI-GENERATED OPPORTUNITY HYPOTHESES
These are generated suggestions, not verified review quotations. Check current App Store reviews and speak with users before treating a possible gap as a requirement.
Hypothesis 1
Add a social sharing feature to compare readings with friends.
Assumption to check: Limited user engagement due to lack of community features.
Validate with people who use this workflow before building.
Hypothesis 2
Implement a search and filter functionality to access past readings quickly.
Assumption to check: Difficulty in remembering past readings.
Validate with people who use this workflow before building.
Hypothesis 3
Provide detailed analytics and suggestions based on readings.
Assumption to check: Inadequate feedback on readings.
Validate with people who use this workflow before building.
App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
App Store description
Read any green like you've got a tour caddie in your pocket. Set your phone on the green, and it measures the slope and tells you exactly how much your putt breaks — based on green speed and distance. Real physics, no guessing. HOW TO USE 1. Behind your ball, find your line to the hole. 2. Lay the phone flat on the green, screen up, perpendicular to your line. 3. Read the break, aim, drain it. (Or don't. We've done our part.) FLAT PHONE = ACCURATE READ Got a camera bump? Keep your phone in its case (the raised edge levels it out), or even easier: tap Calibrate to Level on any flat, level surface and the app zeroes your phone out for good. The screen stays awake while you work the green. WHAT YOU GET • Live slope and direction from your phone's sensors • Exact break in inches, measured from the edge of the cup • "Plays like X feet" so you know how hard to hit it • A visual aim line and ball path, plus an overhead green view • Green speed (stimp) and putt length up to 40 feet FAIR WARNING This is 100% not legal for tournament play — reading greens with a device breaks Rule 4.3, so consider this a practice-round and bar-bet tool only. Then again, your putting probably isn't winning any tournaments either, so... we're good.
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Screenshots
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Build scope
Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.
Define the first version
Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.
Set boundaries
Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.
Check the hard parts
Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.
SUGGESTED BUILD STACK
React Native
Expo
Supabase
Zustand
react-navigation
expo-image-picker
BUILD KIT DIFFICULTY
Intermediate
From the Build Kit assessment.
A reliable timeline needs an agreed scope and a technical check. Ask your agent to estimate the phases in BUILD_PLAN.md after that review.
